Speedometer ratio checker



FIG. 1 is a front elevation of a speedometer ratio checker showing mynew design;

FIG. 2 is a right side elevation thereof;

FIG. 3 is a bottom plan view thereof, the opposite side being a mirrorimage;

FIG. 4 is a left side elevation thereof, and

FIG. 5 is a rear elevation thereof.

The ornamental design for a speedometer ratio checker, as shown anddescribed.